Struct http_types::proxies::Forwarded

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pub struct Forwarded<'a> { /* private fields */ }

Expand description

A rust representation of the forwarded header.

Implementations§

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impl<'a> Forwarded<'a>

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pub fn from_headers( headers: &'a impl AsRef<Headers> ) -> Result<Option<Self>, ParseError>

Attempts to parse a Forwarded from headers (or a request or response). Builds a borrowed Forwarded by default. To build an owned Forwarded, use Forwarded::from_headers(...).into_owned()

X-Forwarded-For, -By, and -Proto compatability

This implementation includes fall-back support for the historical unstandardized headers x-forwarded-for, x-forwarded-by, and x-forwarded-proto. If you do not wish to support these headers, use Forwarded::from_forwarded_header. To only support these historical headers and not the standardized Forwarded header, use Forwarded::from_x_headers.

Please note that either way, this implementation will normalize to the standardized Forwarded header, as recommended in rfc7239§7.4

Examples

let mut request = Request::new(Get, Url::parse("http://_/")?);
request.insert_header(
    "Forwarded",
    r#"for=192.0.2.43, for="[2001:db8:cafe::17]", for=unknown;proto=https"#
);
let forwarded = Forwarded::from_headers(&request)?.unwrap();
assert_eq!(forwarded.proto(), Some("https"));
assert_eq!(forwarded.forwarded_for(), vec!["192.0.2.43", "[2001:db8:cafe::17]", "unknown"]);

let mut request = Request::new(Get, Url::parse("http://_/")?);
request.insert_header("X-Forwarded-For", "192.0.2.43, 2001:db8:cafe::17, unknown");
request.insert_header("X-Forwarded-Proto", "https");
let forwarded = Forwarded::from_headers(&request)?.unwrap();
assert_eq!(forwarded.forwarded_for(), vec!["192.0.2.43", "[2001:db8:cafe::17]", "unknown"]);
assert_eq!(forwarded.proto(), Some("https"));
assert_eq!(
    forwarded.value()?,
    r#"for=192.0.2.43, for="[2001:db8:cafe::17]", for=unknown;proto=https"#
);

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pub fn from_forwarded_header( headers: &'a impl AsRef<Headers> ) -> Result<Option<Self>, ParseError>

Parse a borrowed Forwarded from the Forwarded header, without x-forwarded-{for,by,proto} fallback

Examples

let mut request = Request::new(Get, Url::parse("http://_/")?);
request.insert_header(
    "Forwarded",
    r#"for=192.0.2.43, for="[2001:db8:cafe::17]", for=unknown;proto=https"#
);
let forwarded = Forwarded::from_forwarded_header(&request)?.unwrap();
assert_eq!(forwarded.proto(), Some("https"));
assert_eq!(forwarded.forwarded_for(), vec!["192.0.2.43", "[2001:db8:cafe::17]", "unknown"]);

let mut request = Request::new(Get, Url::parse("http://_/")?);
request.insert_header("X-Forwarded-For", "192.0.2.43, 2001:db8:cafe::17");
assert!(Forwarded::from_forwarded_header(&request)?.is_none());

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pub fn from_x_headers( headers: &'a impl AsRef<Headers> ) -> Result<Option<Self>, ParseError>

Parse a borrowed Forwarded from the historical non-standardized x-forwarded-{for,by,proto} headers, without support for the Forwarded header.

Examples

let mut request = Request::new(Get, Url::parse("http://_/")?);
request.insert_header("X-Forwarded-For", "192.0.2.43, 2001:db8:cafe::17");
let forwarded = Forwarded::from_headers(&request)?.unwrap();
assert_eq!(forwarded.forwarded_for(), vec!["192.0.2.43", "[2001:db8:cafe::17]"]);

let mut request = Request::new(Get, Url::parse("http://_/")?);
request.insert_header(
    "Forwarded",
    r#"for=192.0.2.43, for="[2001:db8:cafe::17]", for=unknown;proto=https"#
);
assert!(Forwarded::from_x_headers(&request)?.is_none());

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pub fn parse(input: &'a str) -> Result<Self, ParseError>

parse a &str into a borrowed Forwarded

Examples

let forwarded = Forwarded::parse(
    r#"for=192.0.2.43,         for="[2001:db8:cafe::17]", FOR=unknown;proto=https"#
)?;
assert_eq!(forwarded.forwarded_for(), vec!["192.0.2.43", "[2001:db8:cafe::17]", "unknown"]);
assert_eq!(
    forwarded.value()?,
    r#"for=192.0.2.43, for="[2001:db8:cafe::17]", for=unknown;proto=https"#
);

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pub fn into_owned(self) -> Forwarded<'static>

Transform a borrowed Forwarded into an owned Forwarded. This is a noop if the Forwarded is already owned.

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pub fn apply(&self, headers: impl AsMut<Headers>)

Insert a header that represents this Forwarded.

Example

let mut response = http_types::Response::new(200);
let mut forwarded = http_types::proxies::Forwarded::new();
forwarded.add_for("192.0.2.43");
forwarded.add_for("[2001:db8:cafe::17]");
forwarded.set_proto("https");
forwarded.apply(&mut response);
assert_eq!(response["Forwarded"], r#"for=192.0.2.43, for="[2001:db8:cafe::17]";proto=https"#);

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pub fn value(&self) -> Result<String, Error>

Builds a Forwarded header as a String.

Example

let mut forwarded = http_types::proxies::Forwarded::new();
forwarded.add_for("_haproxy");
forwarded.add_for("[2001:db8:cafe::17]");
forwarded.set_proto("https");
assert_eq!(forwarded.value()?, r#"for=_haproxy, for="[2001:db8:cafe::17]";proto=https"#);

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